truncation when vi a file

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LEARN ABOUT SUNOS

uniq

uniq(1) 							   User Commands							   uniq(1)

NAME

       uniq - report or filter out repeated lines in a file

SYNOPSIS

       uniq [-c | -d | -u]  [-f fields] [-s char] [ input_file [output_file]]

       uniq [-c | -d | -u]  [-n] [ + m] [ input_file  [output_file]]

DESCRIPTION

       The uniq utility will read an input file comparing adjacent lines, and write one copy of each input line on the output. The second and suc-
       ceeding copies of repeated adjacent input lines will not be written.

       Repeated lines in the input will not be detected if they are not adjacent.

OPTIONS

       The following options are supported:

       -c	       Precedes each output line with a count of the number of times the line occurred in the input.

       -d	       Suppresses the writing of lines that are not repeated in the input.

       -f fields       Ignores the first fields fields on each input line when doing comparisons, where fields is a positive  decimal  integer.  A
		       field is the maximal string matched by the basic regular expression:

		       [[:blank:]]*[^[:blank:]]*

		       If fields specifies more fields than appear on an input line, a null string will be used for comparison.

       -s chars        Ignores	the first chars characters when doing comparisons, where chars is a positive decimal integer. If specified in con-
		       junction with the -f option, the first chars characters after the first fields fields will be ignored. If  chars  specifies
		       more characters than remain on an input line, a null string will be used for comparison.

       -u	       Suppresses the writing of lines that are repeated in the input.

       -n	       Equivalent to -f fields with fields set to n.

       +m	       Equivalent to -s chars with chars set to m.

OPERANDS

       The following operands are supported:

       input_file      A path name of the input file. If input_file is not specified, or if the input_file is -, the standard input will be used.

       output_file     A path name of the output file. If output_file is not specified, the standard output will be used. The results are unspeci-
		       fied if the file named by output_file is the file named by input_file.

EXAMPLES

       Example 1: Using the uniq command

       The following example lists the contents of the uniq.test file and outputs a copy of the repeated lines.

       example% cat uniq.test
       This is a test.
       This is a test.
       TEST.
       Computer.
       TEST.
       TEST.
       Software.

       example% uniq -d uniq.test
       This is a test.
       TEST.
       example%

       The next example outputs just those lines that are not repeated in the uniq.test file.

       example% uniq -u uniq.test
       TEST.
       Computer.
       Software.
       example%

       The last example outputs a report with each line preceded by a count of the number of times each line occurred in the file:

       example% uniq -c uniq.test
	  2 This is a test.
	  1 TEST.
	  1 Computer.
	  2 TEST.
	  1 Software.
       example%

ENVIRONMENT VARIABLES

       See environ(5) for descriptions of the following environment variables that affect the execution of uniq: LANG, LC_ALL,	LC_CTYPE,  LC_MES-
       SAGES, and NLSPATH.

EXIT STATUS

       The following exit values are returned:

       0	Successful completion.

       >0	An error occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWesu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       comm(1), pack(1), pcat(1), sort(1), uncompress(1), attributes(5), environ(5), standards(5)

SunOS 5.10							    20 Dec 1996 							   uniq(1)

UNIX for Advanced & Expert Users